Working on debianisation and packaging.

[chiark-utils.git] / backup / backuplib.pl

diff --git a/backup/backuplib.pl b/backup/backuplib.pl
index 9acd7a0147c4072209d5181a75fb045350a9f31e..26a8533d1150e85ee3e2fa7079f742ddf2df5647 100644 (file)
--- a/backup/backuplib.pl
+++ b/backup/backuplib.pl
@@ -1,6 +1,25 @@
+# backuplib.pl
+# core common routines
 #
-
-# Assorted useful functions used by the backup scripts.
+# This file is part of chiark backup, a system for backing up GNU/Linux and
+# other UN*X-compatible machines, as used on chiark.greenend.org.uk.
+#
+# chiark backup is:
+#  Copyright (C) 1997-1998,2000-2001 Ian Jackson <ian@chiark.greenend.org.uk>
+#  Copyright (C) 1999 Peter Maydell <pmaydell@chiark.greenend.org.uk>
+#
+# This is free software; you can redistribute it and/or modify it under the
+# terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2, or (at your option) any later version.
+#
+# This is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 sub printdate () {
     print scalar(localtime),"\n";
@@ -54,11 +73,14 @@ sub killprocesses {
 # Trailing whitespace is ignored. Lines of the form 'prefix foo bar'
 # are handled specially, as arex lines 'exclude regexp'; otherwise 
 # we just shove the line into @fsys and let parsefsys deal with it.
-sub readfsys ($) {
-    my ($fsnm) = @_;
-    open F, "$etc/fsys.$fsnm" or die "Filesystems $fsnm unknown ($!).\n";
+
+sub readfsysfile ($) {
+    my ($fn) = @_;
+    my ($fh,$sfn);
+    $fh= new IO::File "$fn", "r" or die "cannot open fsys file $fn ($!).\n";
     for (;;) {
-       $_= <F> or die "unexpected EOF in $etc/fsys.$fsnm\n"; chomp; s/\s*$//;
+       $!=0; $_= <$fh> or die "unexpected EOF in $fn ($!)\n";
+       chomp; s/\s*$//;
        last if m/^end$/;
        next unless m/\S/;
        next if m/^\#/;
@@ -70,11 +92,23 @@ sub readfsys ($) {
             push @excldir,$1;
         } elsif (m/^exclude\s+(\S.*\S)$/) {
             push @excl,$1;
+       } elsif (m/^include\s+(\S.*\S)$/) {
+           $sfn =~ s/^\./fsys./;
+           $sfn = "$etc/$sfn" if $sfn !~ m,^/,;
+           readfsysfile($sfn);
         } else {
            push @fsys,$_;
        }
     }
-    close F or die $!;
+    close $fn or die $!;
+}
+
+sub readfsys ($) {
+    my ($fsnm) = @_;
+    my ($fsf);
+    $fsf= "$etc/fsys.$fsnm";
+    stat $fsf or die "Filesystems $fsnm unknown ($!).\n";
+    readfsysfile($fsf);
 }
 
 # Parse a line from a filesystem definition file. We expect the line